September 2002
Intermediate to advanced
332 pages
11h 1m
English
Content preview from IBM eServer zSeries 900 Technical Guide
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Chapter 5. Sysplex functions 191
– The PPRC configuration must have one-to-one correspondence between each primary
SSID and secondary SSID.
– Hyperswap devices cannot attach to systems outside the Parallel Sysplex.
Production systems must have sufficient channel bandwidth to primary and secondary
PPRC disk subsystems. Because of bandwidth considerations, it is recommended to use
FICON for zSeries to disk attachment if the distance between sites exceeds 5 kilometers.
5.4.2 GDPS/XRC
GDPS/XRC is a combined hardware and software asynchronous remote copy solution. The
application I/O is signalled completed when the data update to the primary storage is
completed. A DFSMS component, called System Data Mover (SDM), asynchronously
offloads data from ...
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